Physico-mechanical properties of the products based on filled epoxy-oligomeric mixtures composed of Epidian-5 epoxy resin, oligoesteracrylate TGM-3 and monoperoxide derivative of Epidian-6 epoxy resin (PO) have been investigated. CaCO 3 was used as a filler and polyethylene polyamine was a curing agent. The effect of PO and CaCO 3 on the gel-fraction content and physicomechanical properties was examined. Using a scanning electron microscopy (SEM) the morphology of the samples has been studied.